/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineSubsystem.h
Called when the connection state as reported by the online platform changes
typedef TMulticastDelegate_ThreeParams< void, const [FString](API\Runtime\Core\Containers\FString) &, [EOnlineServerConnectionStatus::Type](API\Plugins\OnlineSubsystem\EOnlineServerConnectionStatus__T-), [EOnlineServerConnectionStatus::Type](API\Plugins\OnlineSubsystem\EOnlineServerConnectionStatus__T-) > FOnConnectionStatusChanged